Saturday 6 July was an exciting day for Prince Harry and Meghan Markle and their son!
Archie Harrison Mountbatten-Windsor, who is two months old, was christened at Windsor Castle.
The Duke of Duchess of Sussex chose not to share loads of details about their baby's christening with the public beforehand.
But they released these photos afterwards.
Past royal christenings have also been pretty private affairs, although the names of guests and godparents have normally been released and the media have also been able to take pictures of guests making their way to the church.
The Duke and Duchess' close friends and family members attended the ceremony, although the Queen, who is Archie's grandmother, missed out on Archie's big day because of other commitments.
A christening is a special ceremony that is common in the Christian faith.
When a baby or child is christened, they are said to become a part of God's family and parents promise to bring the child up in the Christian faith.
During the event, a vicar will baptise a child with water and say a blessing.
The baby normally wears a white gown and the baptism involves pouring water over the child's head - symbolic of washing away sin.
But it's not just babies - children and adults can be christened at any age.
A royal christening is certainly nothing new! Archie's cousin Prince Louis was christened in July 2018..
The ceremony took place in The Chapel Royal at St James's Palace in London.
The Duke and Duchess of Cambridge's daughter Princess Charlotte was christened in at the Church of St Mary Magdalene in Sandringham in 2015.
Their oldest child, Prince George, was christened in October 2013 when he was three months old.
Baby Archie's dad Harry also had his infant baptism at Windsor Castle on 21 December 1984 - like father, like son!